docs/deploy.rst: Fix incorrect syntax associated with nginx and ini code-blocks
docs/deploy.rst: Fix incorrect syntax associated with nginx and ini code-blocks

This commit fixes the following warnings:

```
/path/to/girder/docs/deploy.rst:81: WARNING: Could not lex literal_block as "nginx". Highlighting skipped.
/path/to/Projects/girder/docs/deploy.rst:96: WARNING: Could not lex literal_block as "ini". Highlighting skipped.
/path/to/Projects/girder/docs/deploy.rst:113: WARNING: Could not lex literal_block as "ini". Highlighting skipped.
```

adsorensen/girder,kotfic/girder,kotfic/girder,jbeezley/girder,manthey/girder,jbeezley/girder,RafaelPalomar/girder,Kitware/girder,jbeezley/girder,Xarthisius/girder,Xarthisius/girder,manthey/girder,jbeezley/girder,sutartmelson/girder,adsorensen/girder,girder/girder,Xarthisius/girder,data-exp-lab/girder,sutartmelson/girder,Kitware/girder,Xarthisius/girder,adsorensen/girder,kotfic/girder,sutartmelson/girder,data-exp-lab/girder,data-exp-lab/girder,sutartmelson/girder,RafaelPalomar/girder,girder/girder,RafaelPalomar/girder,data-exp-lab/girder,RafaelPalomar/girder,kotfic/girder,girder/girder,sutartmelson/girder,kotfic/girder,Xarthisius/girder,manthey/girder,manthey/girder,data-exp-lab/girder,adsorensen/girder,girder/girder,Kitware/girder,RafaelPalomar/girder,Kitware/girder,adsorensen/girder